Draft diverter



R. I L. KLAR DRAFT DIVERTER Feb. 23, 1937.

Filed May 25, 1936 r 1 m wm wk 0 in M 4 m. m, Q 5 M Patented Feb. 23, 1937 UNITED STATES DRAFT DIVERTER Robert L. Klar, Des Moines, Iowa, assignor to Leland Heater Company,

corporation of Iowa Application May 25,

7 Claims.

The object of my invention is to provide a draft diverter adapted for use in connection with pipes for conducting the products of combustion away from the point of combustion.

More particularly, it is my object to provide a draft diverter of such construction that it will allow excessive draft and that it will not allow too much back draft on the appliance.

In this connection, it is my purpose to provide a draft diverter in connection with a pipe for carrying products of combustion, and having spaced holes, the draft diverter including a partition preferably in the form of a double cone between the spaced holes, a hood in the form of a truncated cone connected to a pipe between the spaced holes and another larger generally similar hood connected to the pipe above the holes.

With these and other objects in View, my invention consists in the construction, arrangement and combination of the various parts of my draft diverter, whereby the objects contemplated are attained, as hereinafter more fully set forth, pointed out in my claims, and illustrated in the accompanying drawing, in which:

Figure 1 is a side elevation of a draft diverter embodying my invention shown installed in connection with a water heater.

Figure 2 is a vertical, sectional view of the draft diverter taken on the line 22 of Figure 1.

Figure 3 is a horizontal, sectional View taken on the line 3-3 of Figure 2; and

Figure 4 is a sectional view showing the joint of Figure 2 on an enlarged scale.

My draft diverter may be illustrated as used in connection with a hot water heater, such for instance as is illustrated in the Leland patent, No. 1,823,803.

In the accompanying drawing, I have used the reference character A to indicate a water heater of the type under consideration. Such a water heater has, as nearly as may be, a balanced draft. The products of combustion emerge through the pipe 10, which is connected by an elbow II with the pipe [2 leading to the stack l3.

Sections of the pipe 12 are connected by a seam, as at M.

In the wall of the pipe I2 above the seam I4 is a horizontal row of holes 15 and below the seam I4 is a horizontal row of holes 16.

In the pipe 12 between the upper and lower rows of holes is a partition, which is preferably in the form of a double cone, comprising the upper cone IT and the lower inverted cone l8. Th cone-shaped partition members are used in Des Moines, Iowa, a

1936, Serial No. 81,699

preference to a disc-type partition, because they afford better deflecting and guiding means.

A hood 19 in the form of a truncated cone has its smaller upper end secured to the pipe l2 between the upper and lower rows of holes, and preferably for convenience in manufacture, this cone is secured to the pipe at the seam I l.

As shown in the particular form of structure here illustrated, the lower section We of the pipe l2 has at its upper edge an outwardly extending annular flange 20.

The cone partition members ll and I8 have flanges ii at their peripheries resting above the flange 2!].

The hood l9 has at its upper, smaller end, a short cylindrical portion 22 to fit the pipe l2 and terminating in a horizontal, peripheral flange 22aarranged just below the flange 20 at the upper end of the pipe section l2a.

The pipe section 12b above the section lZa has at its lower end a peripheral flange 23 at the outer end of which is a downwardly extending annular flange it, having at its lower end an inturned annular flange 25.

Thus the flange 2| rests above the flanges at the peripheries of the cone partition members H and I8 and the flange 25 is below the flange 2211. at the upper end of the cone hood l9.

There is thus provided a simple and inexpensive joint structure for the assembling of the pipe sections Ma. and I22), the cone partition members 51 and i3 and the hood I9.

The upper smaller end of a hood 26 having the form of a truncated cone is secured to the outside of the pipe i2 above the upper row of holes I5. The hood 26 is larger than the hood l9 and eX- tends downwardly preferably surrounding the hood i9 and spaced therefrom.

At the lower end of the hood 26, it has a cylindrical downwardly extending skirt 2?, which extends preferably from just above the level of the lower end of the hood E9 to a point substantially below the hood IS.

The fault of the ordinary draft diverters in many cases and especially when used with a balanced down draft heater, such as that shown at A is twofold. There are times when too much draft is imposed, that is there is too great a pull through the pipe for carrying away the products of combustion,-and in the second place, sometimes there is a back draft from the stack, and that back draft is imparted to the heater.

My present draft diverter has been carefully tested, and I find that it is free from these two objectionable features.

In the use of my draft diverter, the products of combustion from the pipe l travel upwardly through the lower section I 2a of the pipe I 2 to the partition member l8, which tends to deflect them and they pass outwardly from the pipe section in through the hole IE to the space between the pipe section EM and the hood l9.

They then pass downwardly under the edge of the hood l9 and upwardly between the hood is and the hood 26 and through the holes I into the upper pipe section I21) and thence downwardly to the stack.

If there is a strong chimney pull, it is not imparted to the pipe section l 20, and the heater, but there is then a tendency to draw air from the basement or from the room in which the heater is located into the lower part of the hood 26, so that no chimney draft or pull is imposed on the heater.

On the other hand, if there is a back draft from the stack, it is not imparted directly to the pipe section l2a, and the heater, but is dissipated from the lower end of the hood 26 into the base ment or room.

Thus the two objectionable features of other draft diverters are avoided by a draft diverter having the structure herein described.

It will be obvious that changes can be made in the details of the construction and arrangement of parts of my improved draft diverter and it is my purpose to cover by my claims, any modified forms of structure which may be reasonably included within their scope and within the scope of my invention.

I claim:

1. A draft diverter structure having a pipe for conducting products of combustion, a partition therein, the pipe having openings in its wall above and below the partition, a downwardly opening flaring hood secured to the pipe between the upper and lower openings, a similar larger hood secured to the pipe above the openings.

2. A draft diverter structure having a pipe for conducting products of combustion, a partition therein in the form of a double cone, the pipe having openings in its wall above and below the partition, a downwardly opening truncated coneshaped hood secured to the pipe between the upper and lower openings, a similar larger hood secured to the pipe above the openings.

3. A draft diverter structure having a pipe for conducting products of combustion, a partition therein, the pipe having circumferential rows of openings in its wall above and below the partition, a downwardly opening truncated cone-shaped hood secured to the pipe between the upper and lower openings, a similar larger hood secured to the pipe above the openings.

4. A draft diverter structure having a pipe for conducting products of combustion, a partition therein, the pipe having openings in its wall above and below the partition, a downwardly opening truncated cone-shaped hood secured to the pipe between the upper and lower openings, a similar larger hood secured to the pipe above the openings, and extending below the first hood.

5. A draft diverter structure having a pipe for conducting products of combustion, a partition therein, the pipe having openings in its wall above and below the partition, 2. downwardly opening truncated cone-shaped hood secured to the pipe between the upper and lower openings, a similar larger hood secured to the pipe above the openings, with a cylindrical portion extending from its lower end downwardly past the first hood.

6. A draft diverter structure having a pipe for conducting products of combustion, a partition therein, the pipe having openings in its wall above and below the partition, a downwardly opening truncated cone-shaped hood secured to the pipe between the upper and lower openings, a similar larger hood secured to the pipe above the openings, and substantially surrounding the first hood.

'7. A draft diverter structure having a pipe for conducting products of combustion, a partition therein in the form of a double cone, the pipe having circumferential rows of openings in its wall above and below the partition, a downwardly opening truncated cone-shaped hood secured to the pipe between the upper and lower openings, a similar larger hood secured to the pipe above the openings, and substantially surrounding the first hood.

ROBERT L. KLAR. 

